Can't agree more with this...in actual fact as a Chinese born outside China I do not know much about our chinese ancestors and their history.
I feel JY and the wuxia stories do contribute to us at least some knowledge about chinese culture and history.
I suppose it's not very accurate but at least it gives us some idea and of course matching these with cross reference to other stories, we get a clearer on the truth and fiction.....hopefully.
It might not be surprising that we know more of British and american history than chinese history...as our history studies is skewed more towards western ( west as of east asia ) then china.